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The advent of ALMA has allowed us to study large populations of protoplanetary disks in nearby star-forming regions based on sub-mm emission. Lupus, of about 1-3 Myr old, is one of the regions with the richest ALMA datasets, it is therefore an ideal laboratory to investigate disk evolution and planet formation processes.
By assembling a highly complete sample of the known disk population in the region, we have conducted an unbiased study of the disk properties. I will describe the main dust and gas disk properties that can be inferred based on ALMA observations, and present the results of the sample from a demographic approach. Based on the relative extent between gas and dust in disks, a fraction of the disks show prominent dust evolution, a crucial step to form planets.
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